I have the standard $12 Ghost 3.5 connector in my G23 and it markedly improves trigger weight and feel. It smooths up the stagy, imprecise "wall" of the OEM trigger and lightens overall trigger weight. Easy as pie to install, assuming you can strip your glock to the frame, which you should be able to do easily. Remove the ejector housing, twist the trigger bar out of its slot, pry the OEM connector out of the side of the block, insert the new connector, twist the trigger bar tab back into its slot, and reinstall the components into the frame. Takes about a minute. Well worth it IMO.
The packaging says "lighter, smoother, crisper trigger" but the online info for the basic one says "lighter, smoother" which I would agree with. The intent is to reduce or remove the "wall" that hinders the movement of the trigger front to rear in this trigger system. So it's more revolver-like and smooth. In that regard it works well. If you're looking for a "1911-like" defined wall and crisp break, you'll need to throw more money and parts at it. I've shot a Salient and a Taran Tactical with full trigger jobs and they are VERY nice glock triggers. But you will paaaaaaaaaaaaaaaaaaaaaaay
This is a good video discussing the Ghost connector and its benefits